दर्पण अपने ऊपर पड़ने वाले प्रकाश की दिशा को बदल देता है। किसी सतह द्वारा प्रकाश की दिशा में होने वाले इस परिवर्तन को क्या कहा जाता है?

Which Indian independence movement leader was primarily known for his philosophy and practice of non-violent civil disobedience?

Who gave the call for 'Do or Die' during the Quit India Movement in 1942?

Which of the following revolutionary pairs were imprisoned together in Cellular Jail and faced harsh conditions, contributing significantly to the Indian independence movement?